Multi-component near-infrared halide scintillation crystal

• Main Authors: TANG GAO, ZHANG SUYIN, YIN HANG, QIN LAISHUN, WEI QINHUA, SHU CHANG
• Format: Patent
• Language: Chinese; English
• Published: 27.02.2024
• Subjects: ADHESIVES; CHEMISTRY; DYES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; MEASUREMENT OF NUCLEAR OR X-RADIATION; MEASURING; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PHYSICS; POLISHES; TESTING

The invention provides a Ce < 3 + > and Sm < 2 + > doped multi-component near-infrared halide scintillation crystal. The chemical formula of the scintillation crystal is Cs2LiLa < 1-x-y > CexSm < y > Br < 6 >, wherein the value range of x is 0 lt; x is greater than 0 and less than or equal to 0.05, and y is greater than 0 and less than or equal to 0.05. The preparation method comprises the following steps: proportioning CsBr powder, LiBr powder, LaBr3 powder, CeBr3 powder and SmBr2 powder according to a molar ratio of 2: 1: (1-x): x: y, fully mixing to obtain raw material powder, and growing the Cs2LiLa1-xCexBr6: ySm < 2 + > multi-component near-infrared halide scintillation crystal through a spontaneous nucleation Bridgman-Stockbarger method. The excitation peak of the crystal is between 200nm and 300nm, the crystal can emit broadband red light with the wavelength of 600-900nm after being excited, and the crystal can be well applied to the fields of near-infrared and high-energy ray detection and imaging. 本发